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/******************************************************************************
* Copyright (c) 2013-2014, Texas Instruments Incorporated - http://www.ti.com/
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Texas Instruments Incorporated nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
#ifndef _source_cache_
#define _source_cache_
#include <llvm/Support/raw_ostream.h>
#include <llvm/Bitcode/ReaderWriter.h>
#include <boost/lexical_cast.hpp>
#include <boost/crc.hpp>
#include <sys/stat.h>
#include <string>
#include <iostream>
#include <sstream>
#include <vector>
#include <stdint.h>
#include "u_locks_pthread.h"
#include "database.h"
class source_cache
{
public:
void remember(std::string source)
{
uint32_t hash = get_crc(source);
std::string query("insert into programs(hash, source) values("
+ boost::lexical_cast<std::string>(hash)
+ ", \""
+ source
+ "\");");
p_database.query(query.c_str());
}
/*-------------------------------------------------------------------------
* Thread safe instance function for singleton behavior
*------------------------------------------------------------------------*/
static source_cache* instance ()
{
static Mutex Cache_instance_mutex;
source_cache* tmp = pInstance;
__sync_synchronize();
if (tmp == 0)
{
ScopedLock lck(Cache_instance_mutex);
tmp = pInstance;
if (tmp == 0)
{
char *user = getenv("USER");
tmp = new source_cache("/tmp/opencl_source_" + string(user));
__sync_synchronize();
pInstance = tmp;
}
}
return tmp;
}
private:
static source_cache* pInstance;
std::string p_dbname;
Database p_database;
private:
source_cache(std::string db_name) : p_dbname(db_name), p_database(db_name.c_str())
{
p_database.query("create table if not exists "
"programs(hash integer, source string);");
}
uint32_t get_crc(std::string& my_string)
{
boost::crc_32_type result;
result.process_bytes(my_string.data(), my_string.length());
return result.checksum();
}
source_cache(const source_cache&); // copy ctor disallowed
source_cache& operator=(const source_cache&); // assignment disallowed
};
#endif // _source_cache_
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